Weight psf sheathing plywood per in.
Roof insulation weight psf.
Asce states that rigid roof insulation weighs 1 5 psf per inch of thickness whereas polyiso insulation like thermax is 0 25psf per inch.
Thickness 1 8 0 4 gypsum sheathing per 1 in.
When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.
9 aug 17 15 48.
3 ply ready roofing 1 0psf 2 15 lb 1 90lb 1 7psf 3 15 lb 1 90lb 2 2psf 3 ply gravel 5 6psf 4 ply gravel 6 0psf 5 ply gravel 6 5psf.
Thickness 3 4 10 0 concrete fill per 1 in.
Thickness 5 0 lumber sheathing per 1 in.
Thickness 2 5 floors and floor finishes asphalt mastic per 1 in.